Needle Conversion
Chart

 

Metric mm	U.S. size	U.K. size
0.5	00000000	24
0.75	000000	22
1.0	00000	19
1.25	0000	18
1.5	000	17
1.75	00	15
2	0	14
2.25	1	13
2.5	1	13
2.75	2	12
3	2	11
3.25	3	10
3.5	4
3.75	5	9
4	6	8
4.25	6
4.5	7	7
5	8	6
5.5	9	5
6	10	4
6.5	10.5	3
7	10.5	2
7.5	11	1
8	11	0
9	13	00
10	15	000
12	17
12.5	17
12.75	17
14	18
15	19
15.5	19
19	35
20	35-36
25	50
25.5	50

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